The Strip Pro Ai Alert 400+ Rear is a premium taillight featuring advanced Ai Alert technology and 10 super-bright LEDs for optimal light dispersion in challenging conditions. Its lightweight and durable co-molded construction with wide-angle optics provides 270deg visibility and offers seven solid and flash output modes including a maximum 400 lumens in Day Flash mode and an impressive 80-hour runtime in FEMTO mode. The versatile silicone rubber mounting strap attaches to aero or round seat posts and the light is rigorously tested to IPX7 waterproofing standards to ensure functionality in tough weather conditions. It also features a 1900 mAh battery capacity and USB-C waterproof charging (cable not included).Advanced taillight with "Ai Alert" brake-sensing technology7 combined solid and flash output modes including Highly disruptive Day Flash modeIncludes versatile silicone rubber mounting strapAero and round seat post-compatible